A QinetiQ article at Airport-International that discusses the Concorde incident. (source)

Justice, Safety Require Balance

An Editorial at Aviation Week that discusses the Concorde incident, and the issue with FOD, but makes no mention of the existence of FOD detection systems.

Significantly, there are no uniform standards for what is acceptable FOD or how to find the junk that could cause harm, just general agreement to try to eliminate all debris. This is accomplished chiefly through periodic inspections. (source)